Update OpenAI model from GPT-4 to GPT-5-nano

Updated all references across the codebase:
- README.md: Updated model references in documentation
- src/functions.py: Updated model name in generate_response function
- templates/index.html: Updated UI text
- templates/post.html: Updated UI text

Author: lewispour

README.md

@@ -9,7 +9,7 @@
 [![Schedule](https://img.shields.io/badge/schedule-v1.2.1-blue)](https://schedule.readthedocs.io/en/stable/)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
-Automate your Twitter presence. Auto Post tweets from from openAI GPT4, from a file, from a string, schedule a new tweet to be posted daily or post the tweet instantly.
+Automate your Twitter presence. Auto Post tweets from from openAI GPT-5-nano, from a file, from a string, schedule a new tweet to be posted daily or post the tweet instantly.
 </div>
 
 ---
@@ -21,12 +21,12 @@ This Python-based Twitter Auto-Post Bot automates tweeting, Credit to the Tweepy
 ### 📁 Files Overview
 #### Using OpenAI
 ##### Instantly:
-- `src/instantly-tweet-from-openai.py`: Immediately tweets a tweet from openAI api response, currently using GPT4, but you can change the model in [functions.py](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/functions.py#L21)
+- `src/instantly-tweet-from-openai.py`: Immediately tweets a tweet from openAI api response, currently using GPT-5-nano, but you can change the model in [functions.py](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/functions.py#L21)
 
 - ###### Prompt defined [here](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/instantly-tweet-from-openai.py#L7) 
 
 ##### Schedule to auto post, tweet daily at a time:
-- `src/schedule-daily-post-from-openai.py`: Automates daily tweets, Runs daily at a scheduled time and queries open ai api to create a tweet, the tweet returned is then automatically tweeted each day to fully automate twitter on auto pilot. By default the model is OPENAI GPT4 but you can change the model in [functions.py](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/functions.py#L21).
+- `src/schedule-daily-post-from-openai.py`: Automates daily tweets, Runs daily at a scheduled time and queries open ai api to create a tweet, the tweet returned is then automatically tweeted each day to fully automate twitter on auto pilot. By default the model is OPENAI GPT-5-nano but you can change the model in [functions.py](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/functions.py#L21).
 - ###### Prompt defined [here](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/schedule-daily-post-from-openai.py#L12) 
 - ###### Schedule time defined [here](https://github.com/lewispour/Twitter-auto-Post-Bot---X.com---Tweepy-python-bot/blob/main/src/schedule-daily-post-from-openai.py#L20)
 
@@ -124,7 +124,7 @@ Your browser should automatically open, or you can manually navigate to the URL.
 - Monitor scheduled jobs
 
 #### Post Tweet
-- **AI-Generated Tweets**: Generate tweets using OpenAI's GPT-4 with custom prompts
+- **AI-Generated Tweets**: Generate tweets using OpenAI's GPT-5-nano with custom prompts
 - **Random from File**: Post a random tweet from your tweets.txt library
 - **Custom Tweet**: Write and post your own tweet with character counter
 

src/functions.py

@@ -18,7 +18,7 @@ def get_formatted_date():
 
 def generate_response(prompt):
     client = OpenAI(api_key=keys.openai_key)
-    model = "gpt-4-1106-preview"
+    model = "gpt-5-nano"
     messages = [
         {"role": "system", "content": "You are a helpful assistant."},
         {"role": "user", "content": prompt}

templates/index.html

@@ -98,7 +98,7 @@ <h1 class="mb-4">
                 <div class="row">
                     <div class="col-md-4 mb-3">
                         <h5><i class="bi bi-robot"></i> AI-Powered Tweets</h5>
-                        <p class="text-muted">Generate tweets using OpenAI's GPT-4 with custom prompts.</p>
+                        <p class="text-muted">Generate tweets using OpenAI's GPT-5-nano with custom prompts.</p>
                     </div>
                     <div class="col-md-4 mb-3">
                         <h5><i class="bi bi-file-text"></i> Tweet Library</h5>

templates/post.html

@@ -19,7 +19,7 @@ <h1 class="mb-4">
                 <i class="bi bi-robot"></i> AI-Generated Tweet
             </div>
             <div class="card-body">
-                <p>Generate a tweet using OpenAI's GPT-4 with a custom prompt.</p>
+                <p>Generate a tweet using OpenAI's GPT-5-nano with a custom prompt.</p>
 
                 <div class="mb-3">
                     <label for="aiPrompt" class="form-label">Prompt for AI</label>